The Grey Stone of Trough
Over Wyresdale, United Kingdom
The Grey Stone of Trough is an historic boundary marker in Bowland Forest High, in the Trough of Bowland, Lancashire, England. A Grade II listed structure, erected in 1897 and standing on Trough Road, it marks the line of the pre-1974 county boundary between Lancashire and the West Riding of Yorkshire. Historically, the Trough marked the westernmost boundary of the ancient Lordship of Bowland. It is in sandstone and has a triangular section with inscriptions on the two sides that face the road.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).